CN217468695U

CN217468695U - Electrode plate for battery pack with self-checking function

Info

Publication number: CN217468695U
Application number: CN202220868480.3U
Authority: CN
Inventors: 宁海洋; 王学龙
Original assignee: Anhui Chaoli Electronic Technology Co ltd
Current assignee: Anhui Chaoli Electronic Technology Co ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-09-20
Anticipated expiration: 2032-04-15

Abstract

The utility model relates to the technical field of battery assembly, in particular to an electrode plate for a battery pack with a self-checking function; the metal contact pin structure comprises a metal sheet body, wherein a plurality of elastic metal contact pins bent upwards are connected to the same surface of the metal sheet body in a rectangular array manner, and the end parts of the metal contact pins are arranged in a tip shape; the utility model discloses an electrode slice can carry out the self-checking to the electric core of arranging before the spot welding, has greatly avoided current electrode slice because of can't carrying out the self-checking to the electric core of arranging, and arouse the condition that the electric core that takes place burns out or explodes among the spot welding process, all has better guarantee effect to operation personnel's physical and mental health and spot welder's use.

Description

Electrode plate for battery pack with self-checking function

Technical Field

The utility model relates to a battery equipment technical field specifically discloses a pole piece for group battery with self-checking function.

Background

In the assembly process of the lithium battery, single battery cells need to be arranged according to requirements, and then a plurality of arranged battery cells are connected in series and in parallel by using electrode plates. At present, a common electrode plate is a nickel plate with a smooth surface, the nickel plate is placed at the positive and negative ends of a battery cell when the nickel plate is connected in series and parallel, and then the positive and negative electrodes of the battery cell are connected through spot welding.

For example, utility model patent application No. 201821554638X just discloses a battery nickel piece, including the nickel piece body, be equipped with a plurality of first reposition of redundant personnel slotted holes according to the interval on the nickel piece body, the both sides of first reposition of redundant personnel slotted hole are spot welding region to be S-shaped with first reposition of redundant personnel slotted hole. The utility model discloses a battery nickel piece is the electrode slice of surfacing promptly, though can release the electric current when spot welding with the reposition of redundant personnel slotted hole seted up at its surface, prevents to explode among the spot welding process. However, the electrode plate of the type can not carry out self-checking on the battery cell arrangement in the process of series-parallel connection of the battery cells, once the positive electrode and the negative electrode of a certain battery cell are mistaken, the battery cell is easily burnt out or even exploded due to rapid increase of current caused by short circuit in the spot welding process, and therefore great harm is brought to physical and mental health of operating personnel and a spot welding machine.

The reason is mainly that the arrangement of the battery cells is manually operated at present, and on one hand, the situation that the positive electrode and the negative electrode of the battery cells are inserted reversely is easy to happen due to long-time fatigue operation of workers in the manual arrangement process; in the second aspect, the battery cell cannot ensure that the arranged battery cell electrode tip is a flat surface when being arranged, and the electrode tip of part of the battery cell protrudes upwards and the electrode tip of part of the battery cell sinks downwards. Therefore, when the existing electrode plates with smooth surfaces are used for series-parallel connection of the battery cells, the arranged battery cell electrode tips can not be completely and effectively contacted with the electrode plates, series-parallel connection of all the battery cells can be completed only after the electrode plates are pressed down by the machine heads of the spot welding machines and the electrode tips are welded, once the positive and negative electrodes of a certain battery cell are reversed, due to the shielding effect of the electrode plates, operators can not find the electrodes timely, even if the operators find the electrodes timely, the electrodes can not be quickly detached, and therefore the situation that the battery cells are burnt out or explode easily occurs in the process of spot welding the electrode plates or after spot welding is completed. Aiming at the problems in the existing series-parallel connection process of the arranged battery cells, the electrode plate capable of performing self-checking on the positive and negative electrodes of the arranged battery cells before spot welding is designed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at current electrode slice because of whole leveling, can't carry out the not enough of self-checking through arranging of electrode slice to electric core before the spot welding to designed one kind can carry out the electrode slice of self-checking to the positive negative pole of the electric core of arranging before the spot welding.

The utility model discloses a realize through following technical scheme:

the utility model provides an electrode piece for group battery with self-checking function, includes the metal sheet body, be connected with a plurality of metal contact pins that have elasticity and upwards buckle that are rectangular array form on the same surface of metal sheet body, the tip of metal contact pin is the tip setting.

In the specific arrangement of the scheme, the metal sheet is one of a nickel-plated steel strip or a copper-aluminum alloy.

As a first design of the above solution, the metal contact pin is formed by stamping from a metal sheet by a stamping die, and a strip-shaped hole is stamped in the metal sheet at the metal contact pin.

As a second design of the above solution, the metal contact pin is connected to the metal sheet body by welding.

As a specific arrangement of the scheme, the thickness of the metal sheet body is set within the range of 0.1mm-1 mm.

As a further arrangement of the above scheme, the metal sheet body is further provided with a through opening.

Has the advantages that:

the utility model discloses an electrode slice is before carrying out the series-parallel connection of spot welding to the electric core of arranging, with the electrode slice lid on the electrode head of electric core, because metal contact pilotage upwards buckles and has certain elasticity, when exerting certain pressure on the electrode slice, even the electric core electrode tip of arranging is not in on the same plane, also can make all metal contact pilotage and the electrode tip that corresponds electric core contact after exerting pressure, in case there is the electric core of positive negative pole mistake, because metal contact pilotage is thinner, make the most advanced resistance of contact pilotage big more, can produce the electric spark in the twinkling of an eye in the contact, this moment the effect personnel can found the unusual electric core that corresponds immediately and correct.

In a word, the utility model relates to an electrode slice though simple structure, but can carry out the self-checking to the electric core of arranging before the spot welding, greatly avoided current electrode slice because of can't carrying out the self-checking to the electric core of arranging, and arouse the electric core condition of burning out or explosion that takes place among the spot welding process, all have better guarantee effect to operation personnel's physical and mental health and spot welder's use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of an electrode sheet in this embodiment 1;

fig. 2 is a schematic perspective view of an electrode sheet in this embodiment 2.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1-2, in conjunction with the embodiments.

Example 1

Embodiment 1 discloses a 2 × 4 electrode sheet for a battery pack, referring to fig. 1, the electrode sheet includes an elongated sheet body 1 made of a nickel-plated steel strip, eight stamping contact pins 101 bent upward are formed on the elongated sheet body 1 by a die in a stamping manner, the eight stamping contact pins 101 are arranged on the elongated sheet body 1 in a rectangular array of two rows and four columns, and when the arranged battery cells are connected in series and in parallel, the stamping contact pins 101 are arranged in an upward bending manner, so that the tips of the stamping contact pins 101 can be in contact with electrode tips on each battery cell.

Since the stamping contact pin 101 in the embodiment 1 is formed by a die, a strip-shaped hole 102 matched with the stamping contact pin 101 is opened at the position of each stamping contact pin 101, and the stamping contact pin 101 can be pressed into the corresponding strip-shaped hole 102 due to the self-elastic action under the action of an external force.

Before the electrode plate disclosed in this embodiment 1 is used to perform series-parallel spot welding on the arranged battery cells, the electrode plate is covered on the arranged battery cells, and then the electrode plate is pressed downwards with force, so that the tip of each stamping contact pin 101 is in contact with the electrode tip on the corresponding battery cell, and at this time, the whole arranged battery cell is connected with a circuit in series or in parallel in advance through the electrode plate. When the positive and negative electrodes of a certain electric core are reversed, due to the fact that the internal resistance of the electric core is very small, the voltage difference is concentrated at the tip of the corresponding stamping contact pin 101, electric sparks are generated, relevant operators can immediately detect the electric core with abnormal arrangement, timely take off an electrode plate and correct the abnormal electric core, and therefore the self-checking process of the electric core arrangement is completed; when all the battery cores are arranged without abnormality, the electrode plates are pressed down without electric sparks, and then the electrode plates and the electrode heads of the battery cores are welded one by one through a spot welding machine.

In addition, it should be noted that the thinner the pressing stylus tip in embodiment 1 is, the greater the electrical resistance of the pressing stylus tip is, the more obvious the acoustooptic effect such as spark generation at the moment of contact is, and the more easily perceived by the operator. Therefore, in the specific design process, the thickness of the strip-shaped sheet body 1 can be set to be 0.1mm-1mm as much as possible, the width of the stamping contact pin 101 formed by stamping is controlled to be set to be not more than 5mm as much as possible, the stamping contact pin is guaranteed to be small enough, and electric sparks generated in the self-checking process of the battery cell can be immediately perceived by operators.

Finally, in order to facilitate the operator to observe the condition of the battery cell below the electrode plate and save raw materials, a through hole 103 is further formed at the position of the non-punching contact pin 101 of the strip-shaped sheet body 1.

Example 2

Embodiment 2 discloses an electrode piece for 2 x 3's group battery, refer to fig. 2, this electrode piece includes a rectangular shape lamellar body 2 made by copper aluminum alloy material, there are six welding contact pins 201 that upwards buckle and kick-back at the upper surface welding of rectangular shape lamellar body 2, its welding contact pin 201 also is made by copper aluminum alloy, and these six welding contact pins 201 are two rows of three columns rectangle arrays and arrange on rectangular shape lamellar body 2, and when carrying out the series-parallel connection to the electric core of arranging, welding contact pin 201 is owing to upwards buckle the setting, make welding contact pin 201's pointed end can contact with the electrode tip on every electric core.

The electrode slice that this embodiment 2 designed is before carrying out spot welding to the electric core of arranging, with whole electrode slice lid on the electric core of arranging, and with the most advanced electric core electrode tip setting that aligns the correspondence of every welding contact needle 201, press the electrode slice hard, because welding contact needle 201 has certain resilience effect, thereby make the most advanced of every welding contact needle 201 and the electrode tip that corresponds on the electric core contact, whole electric core of arranging has carried out series connection in advance or parallelly connected circuit switch-on through the electrode slice this moment. Similarly, when the positive and negative electrodes of a certain electric core are reversed, because the internal resistance of the electric core is very small, the voltage difference is concentrated at the tip of the corresponding welding contact pin 201, and electric sparks are generated, and relevant operators can immediately detect the electric core with abnormal arrangement and timely take down the electrode plate to correct the abnormal electric core, so that the self-checking process of the electric core arrangement is completed; when all the battery cores are arranged without abnormality, the electrode plates are pressed down without electric sparks, and then the electrode plates and the electrode heads of the battery cores are welded one by one through a spot welding machine.

Further, the welding contact pin 201 in the present embodiment 2 is also as thin as possible, and the thinner the welding contact pin 201 is, the more obvious the acoustooptic effect such as spark generation is made at the moment when the welding contact pin 201 contacts with the electrode tip, and the more easily perceived by the operator. Finally, in order to facilitate the operator to observe the condition of the battery cell below the electrode plate and save raw materials, the through opening 202 is further formed at the position of the non-welding contact pin 201 of the strip-shaped sheet body 1.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an electrode piece for group battery with self-checking function, includes the metal sheet body, its characterized in that, be connected with a plurality of metal contact pins that have elasticity and upwards buckle on the same surface of metal sheet body for rectangular array form, the tip of metal contact pin is the pointed end setting.

2. The electrode sheet with self-checking function for battery pack of claim 1, wherein the metal sheet is one of nickel-plated steel strip or copper-aluminum alloy.

3. The electrode sheet for battery pack with self-checking function as claimed in claim 1, wherein the metal contact pin is stamped from a metal sheet by a stamping die, and a strip-shaped hole is stamped on the metal sheet at the metal contact pin.

4. The electrode sheet for battery pack having self-checking function according to claim 1, wherein the metal contact pin is connected to the metal sheet body by welding.

5. The electrode sheet for battery pack having self-checking function according to claim 1, wherein the thickness of the metal sheet body is set in the range of 0.1mm to 1 mm.

6. The electrode sheet with self-checking function for battery pack according to claim 1, wherein the metal sheet is further provided with a through hole.